On the measurement of hydrodynamic properties of an air-polyethylene fluidized bed system

A combination of non-intrusive methods is used for the measurement of hydro dynamic properties of gas phase polymerization reactors. The presented work builds on the findings presented in previous articles. Three different tec hniques are presented here. Time averaged X-ray computer assisted tomograph y, 3-D single and 2-D multiple radioactive particle tracking and X-ray digi tal fluoroscopy. All these methods are applied in simple air-polyethylene e xperiments in laboratory scale fluidized beds. Whenever possible, the volum es of experimental results are combined into simpler plots and compared to existing models in the literature. (C) 2001 Elsevier Science Ltd. All right s reserved.